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# Graphing by using Corresponding y-Values from Random x-Values

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I am having trouble understanding how to choose an x value and a corresponding y value, for example,

y= -3x + 1, y= -4/5x + 13/7, or y=4 - 3x -x^2

Please explain how you choose a random x,y when graphing

© BrainMass Inc. brainmass.com September 25, 2018, 9:09 am ad1c9bdddf - https://brainmass.com/physics/drawing-graphs/graphing-corresponding-values-random-values-112147

#### Solution Preview

I just show you two examples: y= -3x + 1 and y=4 - 3x -x^2.

When you graph these functions, you need to get as many points as you can, then you can draw a smooth curve.

For instance, y=-3x+1

The graph should be a line. In this case, it becomes much easier, since two distinct points on the line can ...

#### Solution Summary

The method of graphing by using corresponding y-values from random x-values is explained. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.

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